I don't think you should end the relationship for that reason. It seems to me kind of disrespectful to your partner to make the choice for them (ok to do it for yourself of course) to end the relationship - it suggests that you think you know better than them what is best for them.
It also doesn't sound like abuse as I think of the word.
It might be being selfish, and I think you are being misleading if you are allowing them to think something (like that you will change) when you know it to be false. But the solution to that is to be upfront, not to end the relationship.